guise-ui 1.5.3

A component library for gpui, Zed's GPU-accelerated UI framework: a themed palette, sizing tokens, 130+ composable components, a reactive state layer, and an in-app Safari-style inspector.
Documentation 
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//! `Accordion` — collapsible sections (gpui entity).

use gpui::prelude::*;
use gpui::{div, px, App, Context, IntoElement, SharedString, Window};

use super::Content;
use crate::devtools::Probed;
use crate::theme::{theme, Size};

struct AccItem {
  label: SharedString,
  content: Content,
}

/// A set of collapsible panels. Create with
/// `cx.new(|cx| Accordion::new(cx).item("Title", |_, _| ...))`.
pub struct Accordion {
  items: Vec<AccItem>,
  open: Vec<bool>,
  multiple: bool,
}

impl Accordion {
  pub fn new(_cx: &mut Context<Self>) -> Self {
    Accordion {
      items: Vec::new(),
      open: Vec::new(),
      multiple: false,
    }
  }

  /// Add a panel. `content` is rebuilt each render.
  pub fn item<E>(
    mut self,
    label: impl Into<SharedString>,
    content: impl Fn(&mut Window, &mut App) -> E + 'static,
  ) -> Self
  where
    E: IntoElement,
  {
    self.items.push(AccItem {
      label: label.into(),
      content: Box::new(move |window, cx| content(window, cx).into_any_element()),
    });
    self.open.push(false);
    self
  }

  /// Allow multiple panels to be open at once (default: only one).
  pub fn multiple(mut self, multiple: bool) -> Self {
    self.multiple = multiple;
    self
  }

  /// Open the panel at `index` initially.
  pub fn default_open(mut self, index: usize) -> Self {
    if let Some(slot) = self.open.get_mut(index) {
      *slot = true;
    }
    self
  }
}

impl Render for Accordion {
  fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
    let t = theme(cx);
    let text = t.text().hsla();
    let dimmed = t.dimmed().hsla();
    let line = t.border().hsla();
    let surface_hover = t.surface_hover().hsla();
    let radius = t.radius(Size::Md);
    let font = t.font_size(Size::Md);
    let font_sm = t.font_size(Size::Sm);

    let mut root = div().flex().flex_col().gap(px(8.0));

    for (i, item) in self.items.iter().enumerate() {
      let is_open = self.open.get(i).copied().unwrap_or(false);

      let header = div()
        .id(("guise-accordion-header", i))
        .flex()
        .items_center()
        .justify_between()
        .px(px(14.0))
        .py(px(12.0))
        .text_size(px(font))
        .text_color(text)
        .hover(move |s| s.bg(surface_hover))
        .child(item.label.clone())
        .child(
          div()
            .text_color(dimmed)
            .child(SharedString::new_static(if is_open {
              "\u{25be}"
            } else {
              "\u{25b8}"
            })),
        )
        .on_click(cx.listener(move |this, _ev, _window, cx| {
          let was = this.open.get(i).copied().unwrap_or(false);
          if !this.multiple {
            this.open.iter_mut().for_each(|o| *o = false);
          }
          if let Some(slot) = this.open.get_mut(i) {
            *slot = !was;
          }
          cx.notify();
        }));

      let mut panel = div()
        .flex()
        .flex_col()
        .rounded(px(radius))
        .border_1()
        .border_color(line)
        .child(header);

      if is_open {
        let body = (item.content)(window, cx);
        panel = panel.child(
          div()
            .px(px(14.0))
            .pb(px(12.0))
            .text_size(px(font_sm))
            .text_color(dimmed)
            .child(body),
        );
      }

      root = root.child(panel);
    }

    root.probe("Accordion")
  }
}